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8608465 Positive-displacement rotary pump having a positive-displacement auxiliary pumping system  
Positive-displacement auxiliary pumping systems for use in pump apparatus of different configurations are disclosed. The positive-displacement auxiliary pumping systems are included in...
8607846 Mold and molding manufacturing method  
A mold includes a first groove part and a second groove part. The first groove part extends with a constant length or a constant width from a center part to an outer circumferential part of the...
8602758 Indexed positive displacement rotary motion device  
An indexing system for a rotor assembly where the indexing system can regulate the rotational location of drive rotors that are configured to rotate about a shaft in one form.
8602756 Scroll type compressor having an elastic member to suppress noise and reduce variations  
Provided is a scroll type compressor which reduces variations in the pressing load of a rotating scroll on a fixed scroll, reduces the impact at the start of the compressor and suppresses noises,...
8602749 Variable displacement vane pump  
A variable displacement vane pump includes, but is not limited to inlet and outlet ports in a pump body, a drive shaft rotatably mounted in the pump body, a rotor driven by the drive shaft and...
8602324 Liquid sprayer  
A motion-powered liquid sprayer that can increase the number of rotations of the pump relative to each rotation of the wheel or axle is provided. The sprayer can include a gearing assembly that...
8602755 Rotary compressor with improved suction portion location  
A rotary compressor is provided. The rotary compressor may include a plurality of cylinders each having a suction port formed such that an intersection of a center line of the suction port and a...
8602759 Screw-type vacuum pump having overpressure openings  
A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber....
8602760 Vane compressor  
A vane compressor according to the present invention, including a cylinder which is approximately cylindrical and whose both ends located in an axial direction are open, a cylinder head and a frame...
8602757 Rotary device  
A device includes a ring having a tubular interior surface centred about an axis. The surface includes a plurality of axially extending, inwardly-projecting ridges. On opposite sides of each ridge...
8602748 Pumping system  
A pumping system having a pump, such as a variable-displacement vane pump or a gear pump. The pump in turn has hydraulic pressure-control dissipating devices for imparting to the oil in a first...
8597002 Hydraulic machine with vane retaining mechanism  
A hydraulic pump or motor includes a body having a chamber and a rotor rotatably mounted within the chamber. The chamber and rotor are shaped to define one or more rise regions, fall regions, major...
8597006 Apex seal for rotary internal combustion engine  
In one aspect, there is described a rotor of a Wankel engine including a plurality of apex seal members each biased by a respective spring, each spring including an axial action portion and a...
8597005 Compressor incorporated with oil separator  
A compressor incorporated with an oil separator having a separation chamber, which is placed adjacent to a discharge chamber, has a space formed in the entire inside of the separation chamber,...
8597004 Scroll type compressor having an intercommunication path in which a pin member is inserted  
A scroll type compressor including a fixed scroll, a movable scroll engaged with the fixed scroll and a hermetically sealed container, one of the fixed scroll and the movable scroll including an...
8597003 Direct control variable displacement vane pump  
A lubrication system for a power transmission device includes a variable displacement vane pump including a moveable control ring for varying the displacement of the pump. A linear actuator...
8597007 Screw pump rotor and method of reducing slip flow  
A pump rotor for a screw pump includes a shaft, a first set of threads disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove...
8591210 Scroll compressor having adjustable spacers  
A scroll compressor 40 comprises: housing 12, orbiting scroll 26 and fixed scroll 41. The drive shaft 14 has an eccentric shaft portion 18 so that rotation of the eccentric shaft portion imparts an...
8590322 Oil separator and refrigerant compressor having the same  
An oil separator includes a separation part and an oil storage part. The separation part includes a separation cylinder, an inner cylinder disposed in the separation cylinder and an inlet pipe...
8585385 Refrigerant compressor and refrigerating cycle device  
A refrigerant compressor includes a first layer (24) composed of a single layer of chromium, a second layer (25) composed of an alloy layer of chromium and tungsten carbide, a third layer (26)...
8585384 Rotary pump including inner rotor and outer rotor having different axial size of an axial clearance  
A housing includes a pump chamber, which rotatably receives an inner rotor and an outer rotor that define a pressure chamber therebetween. An inlet port of the housing is communicated with the...
8585383 Scroll fluid machine  
In a scroll fluid machine where an orbiting scroll fixed to a pivot shaft eccentrically revolves, a fixed portion is provided on a bottom of a casing, and a swing column is provided between the...
8585382 Compressor having capacity modulation assembly  
A compressor includes a shell assembly, first and second scroll members and a capacity modulation assembly. The first and second scroll members form a series of pockets. A first modulation port...
8585376 Water-injection type scroll air compressor  
Disclosed is a water-injection type scroll air compressor whose pre-stopping operation time for drying can be reduced while enhancing compressor efficiency. The compressor body 1 includes a water...
8585381 Scroll type compressor having an intercommunication path in which a pin member is inserted  
A scroll type compressor including a fixed scroll, a movable scroll engaged with the fixed scroll, and a hermetically sealed container in which the fixed scroll and the movable scroll are mounted....
8579613 Vane pump and vapor leakage check system having the same  
A vane pump includes a housing defining a pump chamber; a rotor rotatably arranged in the pump chamber; and a motor to rotate the rotor. An imaginary plane is defined to bisect the pump chamber in...
8579614 Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber  
A scroll compressor has a housing enclosing a compressor pump unit which includes an orbiting scroll member and a non-orbiting scroll member. Each of the orbiting and non-orbiting scroll members...
8579618 Internal gear pump with optimized noise behaviour  
An internal gear pump (1) is proposed for conveying a fluid by a driven pump gear wheel (3) and a ring gear (4), as a gear pair residing in an enclosure, which are, for instance, meshing and hereby...
8579616 Gear pump  
A gear pump includes a gear to be driven by a drive shaft, a pair of side plate members adjoining side surfaces of the gear, respectively, to restrain leakage of an operating fluid, and a tip seal...
8579615 Pivoting, hinged arc vane rotary compressor or expander  
A rotary compressor or expander include a cylindrical housing chamber, a rotatable cylindrical rotor mounted eccentrically with respect to housing chamber center, a cylindrical rotor liner free to...
8579598 Variable capacity vane pump  
A variable capacity vane pump has a plurality of vanes radially extendably installed in their respective slots that are arranged in a circumferential direction in a rotor, a cam ring rockably...
8578908 Dual-rotor engine  
A dual-rotor engine comprises a cylinder assembly, a transmission output mechanism, a rotor control mechanism and a lubrication system. The cylinder assembly comprises a tubular cylinder (6) and...
8579597 Variable capacity type rotary compressor  
A variable capacity type rotary compressor, in which a refrigerant sucked in via one suction pipe can be alternately sucked into each compression space via a communication passage between cylinders...
8579619 Internal gear pump for a brake system  
The invention relates to an internal gear pump for a braking system, in the pump housing of which an inner toothed hollow wheel and a gearwheel engaging in the toothing of the hollow wheel are...
8579617 Oil pump rotor  
An oil pump rotor includes an inner rotor having (n) external teeth, an outer rotor having (n+1) internal teeth, and a casing forming a suction port and a discharge port for drawing/discharging...
8573955 Scroll compressor with noise reducing discharge opening  
A scroll compressor is provided that includes a hermetic container into and out of which a refrigerant flows, a driving device installed in the hermetic container to rotate a rotation axis, an...
8573956 Multiple stage dry pump  
A dry pump includes: a plurality of cylinders; a pump chamber formed in each of the cylinders; a division wall separating pump chambers adjacent to each other; a plurality of rotors contained...
8568117 Powder metal scrolls  
Scrolls made from one or more near-net shaped powder metal processes either wholly or fabricated together from sections. Both “conventional” press and sinter methods and metal injection molding met...
8567057 Motor-compressor unit mounting arrangement for compressors  
A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets,...
8568118 Compressor having piston assembly  
A compressor includes orbiting and non-orbiting scrolls forming first and second fluid pockets therebetween. First and second ports are disposed in the non-orbiting scroll and radially spaced apart...
8568119 Single screw compressor  
A single-screw compressor includes a screw rotor including a spiral groove, a casing, and a gate rotor. The gate rotor includes a plurality of radial gates configured to mesh with the spiral...
8562317 Scroll expansion machine with air flow passage around outer periphery of sealing surface  
The rotating shaft is connected to the generator; the high-pressure steam s is introduced to the expansion chamber b through the guide passage; when the energy of the high-pressure steam s during...
8562319 Screw compressor having slide valve with inclined end face  
A screw compressor includes a screw rotor, a casing, a low pressure space, a bypass passage and a slide valve. The screw rotor is provided with a plurality of helical grooves forming fluid...
8562318 Multiphase pump with high compression ratio  
This disclosure relates to a new multiphase pump with low recirculated volume. This device discloses novel inlet/outlet porting. One of the disclosed improvements is to port the inlet and outlet...
8562316 Variable capacity vane pump  
In a variable capacity vane pump, a space between adjacent vanes is 1 pitch. A line that connects a half-pitch-advanced position from an end edge of an inlet port or from an end edge of an outlet...
8556598 Sealed compressor with multiple compressor unit  
A sealed compressor has an outer housing and a separator plate received within the outer housing. The separator plate defines a suction chamber and a discharge pressure chamber within the outer...
8555611 Combustion engine with feedback gear/rotary pump input  
A combustion engine, which is highly efficient, noiseless and lightweight, includes a combustion chamber without pistons. The combusted and expanded air exiting the combustion chamber flows into a...
8556609 Geared hydraulic apparatus  
An improved geared hydraulic apparatus, comprising a pair of meshing gearwheels, mounted to be reciprocally rotatable in a casing between an inlet side and an outlet side for a fluid having, in...
8556606 Water injection type screw fluid machine  
A screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft located on the high pressure side, and...
8555628 Variable displacement pump and power steering apparatus using the variable displacement pump  
A variable displacement pump including a drive shaft, a cam ring eccentrically moveable with respect to an axis of the drive shaft, and a solenoid drivingly controlled on the basis of variation in...